79691018 has 16 divisors (see below), whose sum is σ = 134611200. Its totient is φ = 35054400.

The previous prime is 79690999. The next prime is 79691023. The reversal of 79691018 is 81019697.

It is a happy number.

It is a super-3 number, since 3×79691018³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57743 + ... + 59106.

It is an arithmetic number, because the mean of its divisors is an integer number (8413200).

Almost surely, 2^79691018 is an apocalyptic number.

79691018 is a deficient number, since it is larger than the sum of its proper divisors (54920182).

79691018 is a wasteful number, since it uses less digits than its factorization.

79691018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116893.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 79691018 is about 8926.9825809172. The cubic root of 79691018 is about 430.3314876746.

The spelling of 79691018 in words is "seventy-nine million, six hundred ninety-one thousand, eighteen".